Good papers in and out of class. Examination papers inside and outside the classroom are good resources, which can help students consolidate their knowledge and skills and improve their learning effect. The test paper is moderately difficult, neither too simple nor too complicated, which can help students improve their problem-solving ability and test-taking skills while consolidating their knowledge. The big test in the experimental class refers to the math problem for the students in the experimental class. These problems are difficult and require students to have solid basic knowledge, strong learning ability and problem-solving skills. So the papers inside and outside the classroom are better than the big questions in the experimental class.